^g => esc unless iTerm2

ctrl-g-to-esc-unless-iterm2.json

{
  "title": "esc = ctrl + g unless iTerm2",
  "rules": [
    {
      "description": "Control + g => Escape unless iTerm2",
      "manipulators": [
        {
          "from": {
            "key_code": "g",
            "modifiers": {
              "mandatory": [
                "control"
              ],
              "optional": [
                "caps_lock",
                "option"
              ]
            }
          },
          "to": [
            {
              "key_code": "escape"
            }
          ],
          "type": "basic",
          "conditions": [
            {
              "type": "frontmost_application_unless",
              "bundle_identifiers": [
                "^com\\.googlecode\\.iterm2$"
              ]
            }
          ]
        }
      ]
    }
  ]
}